1 /* 2 * Copyright (c) 2003 Julien Bordet <zejames@greyhats.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $OpenBSD: it.c,v 1.22 2007/03/22 16:55:31 deraadt Exp $ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/kernel.h> 30 #include <sys/bus.h> 31 #include <sys/module.h> 32 #include <sys/rman.h> 33 34 #include <bus/isa/isavar.h> 35 #include <sys/systm.h> 36 37 #include <sys/sensors.h> 38 39 #include "itvar.h" 40 41 #if defined(ITDEBUG) 42 #define DPRINTF(x) do { printf x; } while (0) 43 #else 44 #define DPRINTF(x) 45 #endif 46 47 /* 48 * IT87-compatible chips can typically measure voltages up to 4.096 V. 49 * To measure higher voltages the input is attenuated with (external) 50 * resistors. Negative voltages are measured using a reference 51 * voltage. So we have to convert the sensor values back to real 52 * voltages by applying the appropriate resistor factor. 53 */ 54 #define RFACT_NONE 10000 55 #define RFACT(x, y) (RFACT_NONE * ((x) + (y)) / (y)) 56 57 int it_probe(struct device *); 58 int it_attach(struct device *); 59 int it_detach(struct device *); 60 u_int8_t it_readreg(struct it_softc *, int); 61 void it_writereg(struct it_softc *, int, int); 62 void it_setup_volt(struct it_softc *, int, int); 63 void it_setup_temp(struct it_softc *, int, int); 64 void it_setup_fan(struct it_softc *, int, int); 65 66 void it_generic_stemp(struct it_softc *, struct ksensor *); 67 void it_generic_svolt(struct it_softc *, struct ksensor *); 68 void it_generic_fanrpm(struct it_softc *, struct ksensor *); 69 70 void it_refresh_sensor_data(struct it_softc *); 71 void it_refresh(void *); 72 73 extern struct cfdriver it_cd; 74 75 static device_method_t it_methods[] = { 76 /* Methods from the device interface */ 77 DEVMETHOD(device_probe, it_probe), 78 DEVMETHOD(device_attach, it_attach), 79 DEVMETHOD(device_detach, it_detach), 80 81 /* Terminate method list */ 82 { 0, 0 } 83 }; 84 85 static driver_t it_driver = { 86 "it", 87 it_methods, 88 sizeof (struct it_softc) 89 }; 90 91 static devclass_t it_devclass; 92 93 DRIVER_MODULE(it, isa, it_driver, it_devclass, NULL, NULL); 94 95 96 const int it_vrfact[] = { 97 RFACT_NONE, 98 RFACT_NONE, 99 RFACT_NONE, 100 RFACT(68, 100), 101 RFACT(30, 10), 102 RFACT(21, 10), 103 RFACT(83, 20), 104 RFACT(68, 100), 105 RFACT_NONE 106 }; 107 108 int 109 it_probe(struct device *dev) 110 { 111 struct resource *iores; 112 int iorid = 0; 113 bus_space_tag_t iot; 114 bus_space_handle_t ioh; 115 u_int8_t cr; 116 117 iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &iorid, 118 0ul, ~0ul, 8, RF_ACTIVE); 119 if (iores == NULL) { 120 DPRINTF(("%s: can't map i/o space\n", __func__)); 121 return 1; 122 } 123 iot = rman_get_bustag(iores); 124 ioh = rman_get_bushandle(iores); 125 126 /* Check Vendor ID */ 127 bus_space_write_1(iot, ioh, ITC_ADDR, ITD_CHIPID); 128 cr = bus_space_read_1(iot, ioh, ITC_DATA); 129 bus_release_resource(dev, SYS_RES_IOPORT, iorid, iores); 130 DPRINTF(("it: vendor id 0x%x\n", cr)); 131 if (cr != IT_ID_IT87) 132 return 1; 133 134 return 0; 135 } 136 137 int 138 it_attach(struct device *dev) 139 { 140 struct it_softc *sc = device_get_softc(dev); 141 int i; 142 u_int8_t cr; 143 144 sc->sc_dev = dev; 145 sc->sc_iores = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->sc_iorid, 146 0ul, ~0ul, 8, RF_ACTIVE); 147 if (sc->sc_iores == NULL) { 148 device_printf(dev, "can't map i/o space\n"); 149 return 1; 150 } 151 sc->sc_iot = rman_get_bustag(sc->sc_iores); 152 sc->sc_ioh = rman_get_bushandle(sc->sc_iores); 153 154 sc->numsensors = IT_NUM_SENSORS; 155 156 it_setup_fan(sc, 0, 3); 157 it_setup_volt(sc, 3, 9); 158 it_setup_temp(sc, 12, 3); 159 160 if (sensor_task_register(sc, it_refresh, 5)) { 161 device_printf(sc->sc_dev, "unable to register update task\n"); 162 return 1; 163 } 164 165 /* Activate monitoring */ 166 cr = it_readreg(sc, ITD_CONFIG); 167 cr |= 0x01 | 0x08; 168 it_writereg(sc, ITD_CONFIG, cr); 169 170 /* Initialize sensors */ 171 strlcpy(sc->sensordev.xname, device_get_nameunit(sc->sc_dev), 172 sizeof(sc->sensordev.xname)); 173 for (i = 0; i < sc->numsensors; ++i) 174 sensor_attach(&sc->sensordev, &sc->sensors[i]); 175 sensordev_install(&sc->sensordev); 176 177 return 0; 178 } 179 180 int 181 it_detach(struct device *dev) 182 { 183 struct it_softc *sc = device_get_softc(dev); 184 int error; 185 186 sensordev_deinstall(&sc->sensordev); 187 sensor_task_unregister(sc); 188 189 error = bus_release_resource(dev, SYS_RES_IOPORT, sc->sc_iorid, 190 sc->sc_iores); 191 if (error) 192 return error; 193 194 return 0; 195 } 196 197 u_int8_t 198 it_readreg(struct it_softc *sc, int reg) 199 { 200 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ITC_ADDR, reg); 201 return (bus_space_read_1(sc->sc_iot, sc->sc_ioh, ITC_DATA)); 202 } 203 204 void 205 it_writereg(struct it_softc *sc, int reg, int val) 206 { 207 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ITC_ADDR, reg); 208 bus_space_write_1(sc->sc_iot, sc->sc_ioh, ITC_DATA, val); 209 } 210 211 void 212 it_setup_volt(struct it_softc *sc, int start, int n) 213 { 214 int i; 215 216 for (i = 0; i < n; ++i) { 217 sc->sensors[start + i].type = SENSOR_VOLTS_DC; 218 } 219 220 ksnprintf(sc->sensors[start + 0].desc, sizeof(sc->sensors[0].desc), 221 "VCORE_A"); 222 ksnprintf(sc->sensors[start + 1].desc, sizeof(sc->sensors[1].desc), 223 "VCORE_B"); 224 ksnprintf(sc->sensors[start + 2].desc, sizeof(sc->sensors[2].desc), 225 "+3.3V"); 226 ksnprintf(sc->sensors[start + 3].desc, sizeof(sc->sensors[3].desc), 227 "+5V"); 228 ksnprintf(sc->sensors[start + 4].desc, sizeof(sc->sensors[4].desc), 229 "+12V"); 230 ksnprintf(sc->sensors[start + 5].desc, sizeof(sc->sensors[5].desc), 231 "Unused"); 232 ksnprintf(sc->sensors[start + 6].desc, sizeof(sc->sensors[6].desc), 233 "-12V"); 234 ksnprintf(sc->sensors[start + 7].desc, sizeof(sc->sensors[7].desc), 235 "+5VSB"); 236 ksnprintf(sc->sensors[start + 8].desc, sizeof(sc->sensors[8].desc), 237 "VBAT"); 238 } 239 240 void 241 it_setup_temp(struct it_softc *sc, int start, int n) 242 { 243 int i; 244 245 for (i = 0; i < n; ++i) 246 sc->sensors[start + i].type = SENSOR_TEMP; 247 } 248 249 void 250 it_setup_fan(struct it_softc *sc, int start, int n) 251 { 252 int i; 253 254 for (i = 0; i < n; ++i) 255 sc->sensors[start + i].type = SENSOR_FANRPM; 256 } 257 258 void 259 it_generic_stemp(struct it_softc *sc, struct ksensor *sensors) 260 { 261 int i, sdata; 262 263 for (i = 0; i < 3; i++) { 264 sdata = it_readreg(sc, ITD_SENSORTEMPBASE + i); 265 /* Convert temperature to Fahrenheit degres */ 266 sensors[i].value = sdata * 1000000 + 273150000; 267 } 268 } 269 270 void 271 it_generic_svolt(struct it_softc *sc, struct ksensor *sensors) 272 { 273 int i, sdata; 274 275 for (i = 0; i < 9; i++) { 276 sdata = it_readreg(sc, ITD_SENSORVOLTBASE + i); 277 DPRINTF(("sdata[volt%d] 0x%x\n", i, sdata)); 278 /* voltage returned as (mV >> 4) */ 279 sensors[i].value = (sdata << 4); 280 /* these two values are negative and formula is different */ 281 if (i == 5 || i == 6) 282 sensors[i].value = ((sdata << 4) - IT_VREF); 283 /* rfact is (factor * 10^4) */ 284 sensors[i].value *= it_vrfact[i]; 285 /* division by 10 gets us back to uVDC */ 286 sensors[i].value /= 10; 287 if (i == 5 || i == 6) 288 sensors[i].value += IT_VREF * 1000; 289 } 290 } 291 292 void 293 it_generic_fanrpm(struct it_softc *sc, struct ksensor *sensors) 294 { 295 int i, sdata, divisor, odivisor, ndivisor; 296 297 odivisor = ndivisor = divisor = it_readreg(sc, ITD_FAN); 298 for (i = 0; i < 3; i++, divisor >>= 3) { 299 sensors[i].flags &= ~SENSOR_FINVALID; 300 if ((sdata = it_readreg(sc, ITD_SENSORFANBASE + i)) == 0xff) { 301 sensors[i].flags |= SENSOR_FINVALID; 302 if (i == 2) 303 ndivisor ^= 0x40; 304 else { 305 ndivisor &= ~(7 << (i * 3)); 306 ndivisor |= ((divisor + 1) & 7) << (i * 3); 307 } 308 } else if (sdata == 0) { 309 sensors[i].value = 0; 310 } else { 311 if (i == 2) 312 divisor = divisor & 1 ? 3 : 1; 313 sensors[i].value = 1350000 / (sdata << (divisor & 7)); 314 } 315 } 316 if (ndivisor != odivisor) 317 it_writereg(sc, ITD_FAN, ndivisor); 318 } 319 320 /* 321 * pre: last read occurred >= 1.5 seconds ago 322 * post: sensors[] current data are the latest from the chip 323 */ 324 void 325 it_refresh_sensor_data(struct it_softc *sc) 326 { 327 /* Refresh our stored data for every sensor */ 328 it_generic_stemp(sc, &sc->sensors[12]); 329 it_generic_svolt(sc, &sc->sensors[3]); 330 it_generic_fanrpm(sc, &sc->sensors[0]); 331 } 332 333 void 334 it_refresh(void *arg) 335 { 336 struct it_softc *sc = (struct it_softc *)arg; 337 338 it_refresh_sensor_data(sc); 339 } 340